The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2012
Filed:
Feb. 03, 2009
Yasusuke Iwashita, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Mamoru Yaeshima, Yamanashi, JP;
Masatomo Shirouzu, Yamanashi, JP;
Koujirou Sakai, Yamanashi, JP;
Yasusuke Iwashita, Yamanashi, JP;
Yuuichi Yamada, Yamanashi, JP;
Mamoru Yaeshima, Yamanashi, JP;
Masatomo Shirouzu, Yamanashi, JP;
Koujirou Sakai, Yamanashi, JP;
Fanuc Ltd, Minamitsuru-gun, Yamanshi, JP;
Abstract
A motor controller capable of effectively utilizing electrical energy accumulated in a capacitor and achieving a reduction in capacitance of the capacitor. The motor controller includes a converter that receives an input AC voltage and performs AC-to-DC power conversion thereon, an inverter that receives DC power and performs DC-to-AC conversion thereon, and a capacitor and a charging/discharging control circuit connected in parallel with a DC link between the converter and the inverter. Electrical energy is supplied from the capacitor to the DC link via the charging/discharging control circuit. The charging/discharging control circuit has a circuit for discharging electrical energy accumulated in the capacitor and for stepping up a voltage of the capacitor when discharging the electrical energy.